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Modified spin-wave analysis of multi-magnon excitations in raman spectra for quantum heisenberg AF systems on a square lattice with/without frustration

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/0921-4534(91)90916-m
Disciplines
  • Physics

Abstract

Abstract Magnon lines for Stokes Shift in the frustrated quantum antiferromagnetic system on a square lattice, where the sub-lattice magnetization vanishes, are calculated by the method of the modified spin wave on the basis of the exchange scattering process. The obtained main peak is essentially accompanied by the side peak whose origin is four magnon process including one magnon condensed at k = 0.

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